-
-
//截取中文字符串
- function mysubstr($str, $start, $len) {
- $tmpstr = "";
- $strlen = $start + $len;
- for($i = 0; $i if(ord(substr($str, $i, 1)) --> 0xa0) {
- $tmpstr .= substr($str, $i, 2);
- $i++;
- } else
- $tmpstr .= substr($str, $i, 1);
- }
- return $tmpstr;
- }
- ?>
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2、截取utf8编码的多字节字符串
-
-
//截取utf8字符串
- function utf8Substr($str, $from, $len) {
- return preg_replace('#^(?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,'.$from.'}'. '((?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,'.$len.'}).*#s', '$1',$str);
- } ?>
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3、UTF-8、GB2312都支持的汉字截取函数
-
-
/*
- Utf-8、gb2312都支持的汉字截取函数 cut_str(字符串, 截取长度, 开始长度, 编码); 编码默认为 utf-8 开始长度默认为 0
- */
- function cut_str($string, $sublen, $start = 0, $code = 'UTF-8') {
- if($code == 'UTF-8') {
- $pa = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/";
- preg_match_all($pa, $string, $t_string);
- if(count($t_string[0]) - $start --> $sublen) return join('', array_slice($t_string[0], $start, $sublen))."...";
- return join('', array_slice($t_string[0], $start, $sublen));
- }
- else
- {
- $start = $start*2;
- $sublen = $sublen*2;
- $strlen = strlen($string);
- $tmpstr = '';
-
- for($i=0; $i=$start && $i129)
- {
- $tmpstr.= substr($string, $i, 2);
- }
- else
- {
- $tmpstr.= substr($string, $i, 1);
- }
- }
- if(ord(substr($string, $i, 1))>129) $i++;
- }
- if(strlen($tmpstr)
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4、BugFree 的字符截取函数
-
-
/**
- * @package BugFree
- * @version $Id: FunctionsMain.inc.php,v 1.32 2005/09/24 11:38:37 wwccss Exp $
- *
- *
- * Return part of a string(Enhance the function substr())
- *
- * @author Chunsheng Wang
- * @param string $String the string to cut.
- * @param int $Length the length of returned string.
- * @param booble $Append whether append "...": false|true
- * @return string the cutted string.
- */
- function sysSubStr($String,$Length,$Append = false)
- {
- if (strlen($String) return $String;
- } else {
- $I = 0;
- while ($I $StringTMP = substr($String,$I,1);
- if ( ord($StringTMP) >=224 )
- {
- $StringTMP = substr($String,$I,3);
- $I = $I + 3;
- }
- elseif( ord($StringTMP) >=192 )
- {
- $StringTMP = substr($String,$I,2);
- $I = $I + 2;
- }
- else
- {
- $I = $I + 1;
- }
- $StringLast[] = $StringTMP;
- }
- $StringLast = implode("",$StringLast);
- if($Append)
- {
- $StringLast .= "...";
- }
- return $StringLast;
- }
- }
-
- $String = "CodeBit.cn -- 简单、精彩、通用";
- $Length = "18";
- $Append = false;
- echo sysSubStr($String,$Length,$Append);
- ?>
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